End-Quench Hardenability Bands — 81B45 H to 86B30 H - METRIC
Tabulations of Band Limits
“J” Distance Millimeters	GRADE
	81B45 H		8617 H		8620 H		8622 H		8625 H		8627 H		8630 H		86B30 H
	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min
1.5	63	56	46	39	48	41	50	43	52	45	54	47	56	49	56	49
3	63	56	44	33	47	37	50	39	51	40	53	43	55	46	56	49
5	63	56	42	27	44	31	47	34	48	35	50	38	54	42	55	48
7	63	56	37	23	40	25	43	28	45	31	47	34	51	38	55	48
9	63	55	32	20	35	22	39	25	41	28	44	31	48	33	54	48
11	63	53	29	—	33	20	35	22	38	25	41	27	44	29	54	47
13	62	49	27	—	30	—	32	20	35	23	38	25	41	27	53	46
15	61	47	25	—	29	—	31	—	33	21	35	24	38	26	53	44
20	59	38	23	—	26	—	28	—	29	—	32	21	34	23	52	39
25	57	35	22	—	24	—	26	—	28	—	30	20	31	21	50	35
30	55	33	20	—	23	—	25	—	27	—	28	—	30	20	48	33
35	52	31	—	—	23	—	24	—	26	—	27	—	29	—	46	30
40	50	29	—	—	23	—	24	—	26	—	27	—	29	—	43	28
45	47	28	—	—	22	—	24	—	26	—	27	—	29	—	41	27
50	44	27	—	—	22	—	24	—	25	—	27	—	29	—	40	25

NOTE:

These values were adjusted to the nearest Rockwell “C” point, and are used when points are selected and specified.

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